Enemy Spotted.Open fire的意思

Enemy Spotted.Open fire的意思 False friends are worth than open enemy. enemy 翻译：False friends are worse than open enemy. the soldiers in the open field were exposed to the enemy's gunfirethe soldiers in the open field是主语,were谓语,exposed to the enemy's gunfire 宾语. spotted proteins怎么翻译? spotted apples什么意思 英语翻译were spotted是什么意思 enemy是什么意思 so,faced with the Danish advance,Alfred did not risk open battle but harried the enemy.请解释advance在这里什么意思,该怎么翻译? OPEN open open open open open open open